package com.lyj.utils;

import java.util.Random;

/**
 * Created by lyj on 2017/10/16.
 */
public class KeyUtil {

    /**
     * 生成唯一的主键
     * 格式：时间+随机数
     * @return
     */
    public static synchronized String genUniqueKey(){
        Random random=new Random();

       Integer number= random.nextInt(900000)+100000;

       return System.currentTimeMillis()+String.valueOf(number);

    }

}
